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DE3842900C1 - - Google Patents

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Publication number
DE3842900C1
DE3842900C1 DE3842900A DE3842900A DE3842900C1 DE 3842900 C1 DE3842900 C1 DE 3842900C1 DE 3842900 A DE3842900 A DE 3842900A DE 3842900 A DE3842900 A DE 3842900A DE 3842900 C1 DE3842900 C1 DE 3842900C1
Authority
DE
Germany
Prior art keywords
light
display elements
housing
electro
light guide
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE3842900A
Other languages
German (de)
Inventor
Herbert Sperl
Hartmuth Siefker
Frank 1000 Berlin De Moessner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TE Connectivity Germany GmbH
Original Assignee
Krone GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Krone GmbH filed Critical Krone GmbH
Priority to DE3842900A priority Critical patent/DE3842900C1/de
Priority to EP89730208A priority patent/EP0374085B1/en
Priority to DE89730208T priority patent/DE58905624D1/en
Priority to AT89730208T priority patent/ATE94674T1/en
Priority to NZ231200A priority patent/NZ231200A/en
Priority to NO89894627A priority patent/NO894627L/en
Priority to AU45539/89A priority patent/AU628427B2/en
Priority to US07/447,550 priority patent/US5044734A/en
Priority to TR89/1021A priority patent/TR24389A/en
Priority to PT92593A priority patent/PT92593B/en
Priority to FI896040A priority patent/FI896040A7/en
Priority to ZA899605A priority patent/ZA899605B/en
Priority to DK638589A priority patent/DK638589A/en
Priority to JP1324095A priority patent/JPH02238486A/en
Priority to CA002005792A priority patent/CA2005792A1/en
Priority to BR898906533A priority patent/BR8906533A/en
Application granted granted Critical
Publication of DE3842900C1 publication Critical patent/DE3842900C1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/35—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being liquid crystals
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/302—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements characterised by the form or geometrical disposition of the individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0418—Constructional details
    • G09F2013/05—Constructional details indicating exit way or orientation

Landscapes

  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal Substances (AREA)
  • Control Of El Displays (AREA)
  • Electroluminescent Light Sources (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention relates to an electro-optical flat-design display device, in particular to an LCD area, comprising a flat-design housing 1 having at least one line of display elements 10 forming the front 8 of the housing 1, and comprising a backlighting device disposed inside the housing 1 and assigned to the line of display elements 10. For reducing the heat load of the LCD display elements 10 and for simplifying the construction of the housing 1, it is provided, according to the invention, that the backlighting device includes a light-guide tube 12, 17 disposed inside the housing 1 and a light source 18 disposed at a light entrance opening of the light-guide tube 12, 17, that the light-guide tube 12 is made from transparent material and surrounded by a reflector material 14, and that the reflector material 14 comprises cutouts 15 assigned to the individual display elements 10 and serving as light-exit openings FIG. 2.

Description

Die Erfindung bezieht sich auf eine elektro-optische Flachanzeigeeinrichtung gemäß dem Oberbegriff des Anspruches 1.The invention relates to an electro-optical Flat display device according to the preamble of claim 1.

Eine gattungsgemäße elektro-optische Flachanzeigeein­ richtung ist aus der EP 02 71 956 A2 vorbekannt. Diese elektro-optische Flachanzeigeeinrichtung benötigt einer­ seits ein Gehäuse mit einer großen Bautiefe, da die das Bild aufweitenden Lichtleitröhren die Bautiefe des Gehäuses beeinflussen. Darüber hinaus ist jedem LCD- Anzeigeelement aus z. B. 16 Pixels eine Lichtleitröhre zugeordnet, wobei die Lichtleitröhren jeweils an die Lichtquelle einzeln angeschlossen sind. Diese einzelne Ausbildung der Lichtleitröhren erhöht zusätzlich den Bauaufwand für die vorbekannte Flachanzeigeeinrichtung. Darüber hinaus sind die das Bild aufweitenden Licht­ leitröhren unbedingt erforderlich, um den Querschnitt der zu diesen führenden dünneren Lichtleitröhren an die Flächenabmessungen der LCD-Anzeigeelemente anzupassen.A generic electro-optical flat display direction is already known from EP 02 71 956 A2. These electro-optical flat display device requires one on the one hand, a housing with a large overall depth, since the The expanding depth of the light guide tubes Affect the housing. In addition, every LCD Display element from z. B. 16 pixels a light pipe assigned, the light pipes each to the Light source are connected individually. This single Formation of the light guide tubes additionally increases the Construction effort for the previously known flat display device. In addition, the light expands the image guide tubes absolutely necessary to the cross section of the leading light guide tubes leading to these Adjust the area dimensions of the LCD display elements.

Der Erfindung liegt von daher die Aufgabe zugrunde, eine elektro-optische Flachanzeigeeinrichtung der gattungs­ gemäßen Art zu schaffen, welche eine besonders kompakte Bauweise ermöglicht, wobei die einzelnen Anzeigeelemente weder durch UV-Wärme-Strahlung noch durch Staubanfall beansprucht werden, und die besonders wartungsfreundlich ist. The invention is therefore based on the object electro-optical flat display device of the genus appropriate way to create a particularly compact Design allows the individual display elements neither by UV heat radiation nor by dust are stressed, and the particularly easy to maintain is.  

Die Lösung dieser Aufgabe ergibt sich aus den kennzeich­ nenden Merkmalen des Anspruches 1. Erfindungsgemäß er­ folgt die rückwärtige Beleuchtung der LCD-Anzeigeelemen­ te mittels einer jeder Reihe von Anzeigeelementen zuge­ ordneten, im Inneren des Gehäuses angeordneten Licht­ leitröhre, deren Lichtquelle an einem Ende, insbesondere außerhalb des Gehäuses, angeordnet ist, und deren offene Seite durch eine streifenförmige Wand gebildet ist, wo­ bei diese mit Ausschnitten versehen ist, die den einzel­ nen Anzeigeelementen zugeordnet sind und als Lichtaus­ trittsöffnungen dienen und deren Flächenabmessungen genau den Flächenabmessungen der zu beleuchtenden LCD- Anzeigeelemente entsprechen. Die Lichtleitröhre besteht aus lichtdurchlässigem Material und ist von einem Reflektor umgeben, so daß die gesamte, von der Licht­ quelle ausgehende Lichtstrahlung innerhalb der einer Reihe von Anzeigeelementen zugeordneten Lichtleitröhre ständig reflektiert wird und nur durch die Ausschnitte des Reflektors unmittelbar im Bereich der einzelnen Anzeigeelemente austreten kann. Hierdurch wird einer­ seits eine vollständige Ausnutzung der Lichtstrahlung der Lichtquelle ermöglicht. Andererseits wird eine besonders geringe Bautiefe erzielt, da die Lichtleit­ röhre unmittelbar hinter den LCD-Anzeigeelementen ver­ läuft. Schließlich erfolgt keine UV- und Wärme- Strahlungsbelastung der Anzeigeelemente, da jegliche Elektroinstallation innerhalb des Gehäuses entfällt. Auch eine Lüftungseinrichtung des Gehäuses ist nicht mehr erforderlich.The solution to this problem results from the characteristics nenden features of claim 1. According to the invention follows the backlighting of the LCD display elements te by means of each row of display elements arranged light arranged inside the housing guide tube, the light source at one end, in particular outside the housing, is arranged, and their open Side is formed by a strip-shaped wall where this is provided with cutouts that the individual NEN display elements are assigned and as light serve openings and their surface dimensions exactly the surface dimensions of the LCD to be illuminated Display elements correspond. The light pipe exists made of translucent material and is from one Reflector surround so that the whole, from the light source outgoing light radiation within the one Row of light guide tubes assigned to display elements is constantly reflected and only through the cutouts of the reflector directly in the area of the individual Display elements can leak. This makes one full exploitation of light radiation the light source. On the other hand, one achieved a particularly low overall depth because the light guide ver directly behind the LCD display elements running. Finally, there is no UV and heat Radiation exposure of the display elements, since any Electrical installation inside the housing is not necessary. A ventilation device of the housing is also not more needed.

Die DE 29 02 745 A1 betrifft über Lichtleiter beleuch­ tete, gattungsfremde Kraftfahrzeuginstrumente. Hierbei werden Lichtleitbänder verwendet, die mit ihrer Stirn­ seite frontal auf eine Folie geklebt sind. Hierbei han­ delt es sich um massive Lichtleitbänder, welche die Merkmale des Gegenstandes des Anspruches 1 nicht ver­ wirklichen. DE 29 02 745 A1 relates to lighting via light guides tete, non-generic automotive instruments. Here light guide strips are used with their forehead are glued frontally onto a film. Here han it is massive light guide strips, which the Features of the subject matter of claim 1 not ver real.  

In weiterer Ausbildung der Erfindung ist die Lichtquelle am außerhalb des Gehäuses gelegenen Ende der Lichtleit­ röhre angeordnet und es sind der Lichtquelle Farb- und Wärmefilter vorgesetzt. Diese Anordnung erhöht einer­ seits die Wartungsfreundlichkeit der Flachanzeigeein­ richtung und vermindert andererseits die Wärmebelastung der Anzeigeelemente im Gehäuse. Schließlich können in den Gehäusefreiräumen zwischen den Lichtleitröhren die elektronischen Bauelemente für die Steuerung der LCD- Anzeigeelemente angeordnet werden.In a further embodiment of the invention, the light source at the end of the light guide located outside the housing tube arranged and there are the light source color and Heat filter added. This arrangement increases one the ease of maintenance of the flat display direction and on the other hand reduces the heat load of the display elements in the housing. Finally, in the housing clearances between the light pipes electronic components for the control of the LCD Display elements are arranged.

Lichtleitröhren sind an sich z. B. aus der DE 34 30 191 vorbekannt. Diese dienen jedoch ausschließlich als Leuchtkörper für die Raumbeleuchtung, wohingegen erfin­ dungsgemäß die Verwendung derartiger Lichtleitröhren bei elektro-optischen Flachanzeigeeinrichtungen, insbeson­ dere LCD-Anzeigetafeln, beansprucht wird. Optical tubes are in themselves z. B. from DE 34 30 191 previously known. However, these only serve as Illuminant for room lighting, whereas invented according to the use of such light guide tubes electro-optical flat display devices, in particular whose LCD display panels is claimed.  

Die Erfindung ist nachfolgend anhand eines in den Zeichnun­ gen dargestellten Ausführungsbeispieles einer als LCD- Anzeigetafel ausgebildeten elektro-optischen Flachanzeige­ einrichtung näher erläutert. Es zeigen:The invention is based on one in the drawings shown embodiment of an LCD Scoreboard-trained electro-optical flat display establishment explained in more detail. Show it:

Fig. 1 eine perspektivische Darstellung der LCD-Anzeige­ tafel und Fig. 1 is a perspective view of the LCD panel and

Fig. 2 eine perspektivische Schnittdarstellung der LCD- Anzeigetafel. Fig. 2 is a perspective sectional view of the LCD display panel.

Die LCD-Anzeigetafel besteht aus einem flachen Gehäuse 1 mit Rückwand 2, Deckwand 3, Bodenwand 4, Seitenwänden 5 und mit Zwischenwänden 6, die sich zwischen den Seitenwänden 5 parallel zu Deckwand 3 und Bodenwand 4 erstrecken und die einzelne Kammern 7 bilden. Die Vorderseite 8 des Gehäuses wird im wesentlichen durch Reihen 9 von LCD-Anzeigeelemen­ ten 10 gebildet, die im Ausführungsbeispiel als bekannte 7-Segmente-Anzeigeelemente ausgebildet sind. Anstelle der 7-Segmente-Anzeigeelemente können auch 3×5-Matrixelemente oder dergleichen verwendet werden. Der Aufbau derartiger LCD-Anzeigeelemente ist in der EP 01 46 285 A2 näher beschrie­ ben. Die LCD-Anzeigeelemente 10 sind von sich auf der Vorderseite 8 längs erstreckenden Profilen 11 aufgenommen, die an der Deckwand 3 und der Bodenwand 4 sowie an den Zwischenwänden 6 befestigt sind. Die den einzelnen LCD- Anzeigeelementen 10 zugeordneten Elektronikbauteile 23 sind an den Zwischenwänden 6 montiert. Auf der Innenseite sind den LCD-Anzeigeelementen 10 Streuscheiben 24 zugeordnet. Das gesamte Gehäuse 1 ist staubdicht verkapselt.The LCD display panel consists of a flat housing 1 with rear wall 2, the top wall 3, the bottom wall 4, side walls 5 and partition walls 6, extending between the side walls 5 parallel to top wall 3 and bottom wall 4 and form the individual chambers. 7 The front 8 of the housing is essentially formed by rows 9 of LCD 10 display elements 10 , which are designed in the embodiment as known 7-segment display elements. Instead of the 7-segment display elements, 3 × 5 matrix elements or the like can also be used. The structure of such LCD display elements is described in more detail in EP 01 46 285 A2. The LCD display elements 10 are accommodated by profiles 11 which extend longitudinally on the front side 8 and which are fastened to the top wall 3 and the bottom wall 4 and to the intermediate walls 6 . The electronic components 23 assigned to the individual LCD display elements 10 are mounted on the partition walls 6 . On the inside, the LCD display elements 10 are assigned to diffusers 24 . The entire housing 1 is encapsulated in a dust-tight manner.

Innerhalb der einzelnen Kammern 7 des Gehäuses 1 sind Lichtleitröhren 12 angeordnet, die im Ausführungsbeispiel U-förmig ausgebildet sind, wobei die offene Seite der U-Form durch eine streifenförmige Wand 13 gebildet ist. Light guide tubes 12 are arranged within the individual chambers 7 of the housing 1 , which are U-shaped in the exemplary embodiment, the open side of the U-shape being formed by a strip-shaped wall 13 .

Die Lichtleitröhren 12 und die U-förmig abschließenden Wände 13 sind von Reflektormaterial 14 umgeben, das nur im Bereich der LCD-Anzeigeelemente 10 Ausschnitte 15 aufweist, die als Lichtaustrittsöffnungen dienen und deren Flächenabmessung genau denjenigen der zu beleuchtenden LCD- Anzeigeelemente 10 entspricht und diesen zugeordnet ist. Innerhalb der Lichtleitröhren 12 sind noch im rückwärtigen Krümmungsbereich der U-Form Konzentratoren 16 gelagert, welche das in den Lichtleitröhren 10 ständig total reflektierte Licht auf die gegenüberliegenden Ausschnitte 15 des Reflektormaterials 14 richten.The light guide tubes 12 and the U-shaped closing walls 13 are surrounded by reflector material 14 , which has cutouts 15 only in the area of the LCD display elements 10 , which serve as light exit openings and whose surface dimensions correspond exactly to those of the LCD display elements 10 to be illuminated and are assigned to them is. Within the light guide tubes 12 , concentrators 16 are still mounted in the rear curvature area of the U-shape, which direct the light that is totally totally reflected in the light guide tubes 10 onto the opposite cutouts 15 of the reflector material 14 .

Jede Lichtleitröhre 12 ist an eine außerhalb des Gehäuses 1 liegende Lichtleitröhre 17 angeschlossen, welche an ihrem einen Ende eine Lichtquelle 18 aufweist, welche ihre gesam­ te Lichtstrahlung mittels eines geeigneten Reflektors 25 in die Lichtleitröhre 17 einleitet. An den Abwinklungen der Lichtleitröhre 17 und an den Einrittsstellen der Lichtleit­ röhren 12 sind Umlenkspiegel 19, 20 angeordnet, wobei die Umlenkspiegel 19 die gesamte, zugeleitete Lichtstrahlung und die Umlenkspiegel 20 nur jeweils eine Teilstrahlung in die jeweilige Lichtleitröhre 17 bzw. 12 umlenken. Schließ­ lich sind der Lichtquelle 18 ein als Glasscheibe ausgebil­ detes Wärmefilter 21 und ein Farbfilter 22 vorgeschaltet, das als elektrisch steuerbares, doppelbrechendes Farbfilter in Flüssigkristalltechnologie (ECB-LC-Filter) ausgebildet ist.Each light guide tube 12 is connected to a light guide tube 17 lying outside the housing 1 , which has at one end a light source 18 which initiates all of its light radiation by means of a suitable reflector 25 into the light guide tube 17 . Tubes at the bends of the light guide tube 17 and to the Einrittsstellen the light guide 12 are deflecting mirrors 19, 20 are arranged, with 19 in each case only deflect the deflecting mirror the entire supplied introduced light radiation and the reflecting mirror 20, a part of the radiation into the respective light guide tube 17 and 12 respectively. Finally, the light source 18 is preceded by a heat filter 21 formed as a glass pane and a color filter 22 which is designed as an electrically controllable, birefringent color filter in liquid crystal technology (ECB-LC filter).

Die von der Lichtquelle 18 ausgehende Lichtstrahlung wird nach Durchtritt durch das Farbfilter 22 und das Wärmefilter 21 über die Lichtleitröhre 17 und die Umlenkspiegel 19, 20 total in die einzelnen Lichtleitröhren 12 eingeleitet. Hier erfolgt eine ständige Totalreflektion der eingeleiteten Lichtstrahlung an den Wänden der Lichtleitröhren 12, ein­ schließlich den diesen zugeordneten flachen Wänden 13. The radiation emanating from the light source 18 light radiation is introduced after passage through the color filter 22 and the heat filter 21 via the light guide tube 17 and the deflection mirrors 19, 20 in total, the individual light-guide 12th Here there is a constant total reflection of the light radiation introduced on the walls of the light guide tubes 12 , including finally the flat walls 13 assigned to them .

An der Lichtquelle 18 entgegengesetzten Ende sind in nicht näher dargestellter Weise noch zusätzliche Spiegel zur weitgehend verlustfreien Reflektion der Lichtstrahlung an­ geordnet. Die innerhalb der Lichtleitröhren 12 somit stän­ dig total reflektierte Lichtstrahlung kann nur durch die Lichtaustrittsöffnungen 15 austreten, welche den jeweiligen LCD-Anzeigeelementen 10 zugeordnet sind. Mittels der Kon­ zentratoren 16 wird die Intensität der hier austretenden Lichtstrahlung noch erhöht.At the opposite end of the light source 18 , additional mirrors for largely lossless reflection of the light radiation are arranged in a manner not shown. The within the light guide tubes 12 thus constantly totally reflected light radiation can only exit through the light exit openings 15 , which are assigned to the respective LCD display elements 10 . By means of the Kon concentrators 16 , the intensity of the light radiation emerging here is increased.

Als Material für die Lichtleitröhre 12 und die diese ab­ schließende Wand 13 dient eine an sich bekannte Reflek­ tionsfolie. In besonders bevorzugter Weise wird eine Reflektionsfolie verwendet, welche in der DE 34 30 191 A1 am Beispiel eines Leuchtkörpers mit prismatischer Licht­ führung zur Raumbeleuchtung näher erläutert ist. Hierbei dient eine spezielle Gestaltung der Außenkontur der Licht­ leitfolie der Totalreflektion der Lichtstrahlung innerhalb einer Lichtleitröhre 12, wobei ein Austritt der Strahlung nur innerhalb der Ausschnitte 15 möglich ist.
BezugszeichenlisteAs a material for the light pipe 12 and this from closing wall 13 serves a known reflection foil. In a particularly preferred manner, a reflection film is used, which is explained in DE 34 30 191 A1 using the example of a luminous element with prismatic light guidance for room lighting. In this case, a special design of the outer contour of the light guide foil serves for total reflection of the light radiation within a light guide tube 12 , the radiation only being able to exit within the cutouts 15 .
Reference symbol list

 1 Gehäuse
 2 Rückwand
 3 Deckwand
 4 Bodenwand
 5 Seitenwand
 6 Zwischenwand
 7 Kammer
 8 Vorderseite
 9 Reihe
10 LCD-Anzeigeelement
11 Profil
12 Lichtleitröhre
13 Wand
14 Reflektormaterial
15 Ausschnitt
16 Konzentrator
17 Lichtleitröhre
18 Lichtquelle
19, 20 Umlenkspiegel
21 Wärmefilter
22 Farbfilter
23 Elektronik-Bauelemente
24 Streuscheibe
25 Reflektor 1 housing
2 rear wall
3 top wall
4 bottom wall
5 side wall
6 partition
7 chamber
8 front
9 row
10 LCD display element
11 profile
12 light pipe
13 wall
14 reflector material
15 cutout
16 concentrator
17 light pipe
18 light source
19, 20 deflecting mirror
21 heat filters
22 color filters
23 electronic components
24 lens
25 reflector

Claims (6)

1. Elektro-optische Flachanzeigeeinrichtung,
aus mehreren Reihen von LCD-Anzeigeelementen,
aus mindestens einer diesen zugeordneten Lichtleitröhre aus lichtdurchlässigem, von einem Reflektor umgebenen Material und
aus einer an der Lichteintrittsöffnung der Lichtleitröhre angeordneten Lichtquelle, dadurch gekennzeichnet,
daß jeder Reihe (9) von LCD-Anzeigeelementen (10) innerhalb eines flachen Gehäuses (1) jeweils eine Lichtleitröhre (12) zugeordnet ist, deren offene Seite durch eine streifenförmige Wand (13) gebildet ist und
daß die streifenförmige Wand (13) mit den LCD-Anzeigeelementen (10) zugeordneten Ausschnitten (15) versehen ist, die als Lichtaustrittsöffnungen dienen und deren Flächenabmessungen genau den Flächenabmessungen der zu beleuchtenden LCD-Anzeigeelemente (10) entsprechen. 1. electro-optical flat display device,
from several rows of LCD display elements,
from at least one associated light guide tube made of translucent material surrounded by a reflector and
from a light source arranged at the light entry opening of the light guide tube, characterized in that
that each row ( 9 ) of LCD display elements ( 10 ) within a flat housing ( 1 ) is assigned a light guide tube ( 12 ), the open side of which is formed by a strip-shaped wall ( 13 ) and
that the strip-shaped wall ( 13 ) is provided with cutouts ( 15 ) assigned to the LCD display elements ( 10 ), which serve as light exit openings and whose surface dimensions correspond exactly to the surface dimensions of the LCD display elements ( 10 ) to be illuminated. 2. Elektro-optische Flachanzeigeeinrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Lichtquelle (18) am außerhalb des Gehäuses (1) gelegenen Ende der Lichtleitröhre (12, 17) angeordnet ist.2. Electro-optical flat display device according to claim 1, characterized in that the light source ( 18 ) on the outside of the housing ( 1 ) located end of the light guide tube ( 12 , 17 ) is arranged. 3. Elektro-optische Flachanzeigeeinrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Lichtquelle (18) ein Wärmefilter (21) und ein Farbfilter (22) zugeordnet sind.3. Electro-optical flat display device according to claim 1 or 2, characterized in that the light source ( 18 ) is associated with a heat filter ( 21 ) and a color filter ( 22 ). 4. Elektro-optische Flachanzeigeeinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Wärmefilter (21) aus einer Glasscheibe gebildet ist.4. Electro-optical flat display device according to claim 3, characterized in that the heat filter ( 21 ) is formed from a glass sheet. 5. Elektro-optische Flachanzeigeeinrichtung nach Anspruch 3, dadurch gekennzeichnet, daß das Farbfilter (22) aus einem elektrisch steuerbaren, doppelbrechenden Farbfilter in Flüssigkristalltechnologie (ECB-LC-Filter) gebildet ist.5. Electro-optical flat display device according to claim 3, characterized in that the color filter ( 22 ) is formed from an electrically controllable, birefringent color filter in liquid crystal technology (ECB-LC filter). 6. Elektro-optische Flachanzeigeeinrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die den LCD-Anzeigeelementen (10) zugeordneten Elektronik-Bauelemente (23) zwischen den Lichtleitröhren (12) angeordnet sind.6. Electro-optical flat display device according to one of claims 1 to 5, characterized in that the LCD display elements ( 10 ) associated electronic components ( 23 ) are arranged between the light guide tubes ( 12 ).
DE3842900A 1988-12-16 1988-12-16 Expired - Lifetime DE3842900C1 (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
DE3842900A DE3842900C1 (en) 1988-12-16 1988-12-16
EP89730208A EP0374085B1 (en) 1988-12-16 1989-10-14 Electro-optical planar display, in particular an lcd display panel
DE89730208T DE58905624D1 (en) 1988-12-16 1989-10-14 Electro-optical flat display device, in particular LCD display panel.
AT89730208T ATE94674T1 (en) 1988-12-16 1989-10-14 ELECTRO-OPTICAL FLAT DISPLAY DEVICE, IN PARTICULAR LCD DISPLAY PANEL.
NZ231200A NZ231200A (en) 1988-12-16 1989-10-30 Backlit lcd illuminated by light guides
NO89894627A NO894627L (en) 1988-12-16 1989-11-21 ELECTRO-OPTIC FLAT INSTRUCTIONS, SPECIFICALLY AN LCD SCREEN.
AU45539/89A AU628427B2 (en) 1988-12-16 1989-11-24 Electro-optical flat-design display device, in particular LCD area
US07/447,550 US5044734A (en) 1988-12-16 1989-12-07 Electro-optical flat-design display device, in particular LCD area
TR89/1021A TR24389A (en) 1988-12-16 1989-12-11 ELECTRO-OPTICAL DUEZ GOESTERGE ASSEMBLY BILHASSA LCD GOESTERGE TABLE
PT92593A PT92593B (en) 1988-12-16 1989-12-15 DEVICE FOR ELECTRO-OPTICAL DISPLAY OF FLAT CONFIGURATION, IN PARTICULAR OF VISUALIZATION OF LIQUID CRYSTALS
FI896040A FI896040A7 (en) 1988-12-16 1989-12-15 Electro-optical flat panel display device, in particular an LCD display panel
ZA899605A ZA899605B (en) 1988-12-16 1989-12-15 Electro-optical flat-design display device,in particular lcd area
DK638589A DK638589A (en) 1988-12-16 1989-12-15 ELECTROOPTIC PLAN DISPOSAL DEVICE, ISAER DISPOSAL DEVICE WITH LIQUID CRYSTALS
JP1324095A JPH02238486A (en) 1988-12-16 1989-12-15 Flat shaped photoelectric display device, especially liquid crystal display panel
CA002005792A CA2005792A1 (en) 1988-12-16 1989-12-18 Electro-optical flat-design display device, in particular lcd area
BR898906533A BR8906533A (en) 1988-12-16 1989-12-18 FLAT STYLE ELECTRO-OPTICAL IMAGE EXHIBITION DEVICE

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DE3842900A DE3842900C1 (en) 1988-12-16 1988-12-16

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DE3842900C1 true DE3842900C1 (en) 1990-05-10

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DE89730208T Expired - Fee Related DE58905624D1 (en) 1988-12-16 1989-10-14 Electro-optical flat display device, in particular LCD display panel.

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DE89730208T Expired - Fee Related DE58905624D1 (en) 1988-12-16 1989-10-14 Electro-optical flat display device, in particular LCD display panel.

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US (1) US5044734A (en)
EP (1) EP0374085B1 (en)
JP (1) JPH02238486A (en)
AT (1) ATE94674T1 (en)
AU (1) AU628427B2 (en)
BR (1) BR8906533A (en)
CA (1) CA2005792A1 (en)
DE (2) DE3842900C1 (en)
DK (1) DK638589A (en)
FI (1) FI896040A7 (en)
NO (1) NO894627L (en)
NZ (1) NZ231200A (en)
PT (1) PT92593B (en)
TR (1) TR24389A (en)
ZA (1) ZA899605B (en)

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Also Published As

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AU628427B2 (en) 1992-09-17
JPH02238486A (en) 1990-09-20
NZ231200A (en) 1991-12-23
DK638589A (en) 1990-06-17
FI896040A7 (en) 1990-06-17
ZA899605B (en) 1990-09-26
AU4553989A (en) 1990-06-21
EP0374085B1 (en) 1993-09-15
EP0374085A3 (en) 1990-12-05
CA2005792A1 (en) 1990-06-16
NO894627D0 (en) 1989-11-21
BR8906533A (en) 1990-08-28
PT92593A (en) 1990-06-29
ATE94674T1 (en) 1993-10-15
NO894627L (en) 1990-06-18
DK638589D0 (en) 1989-12-15
TR24389A (en) 1991-09-24
DE58905624D1 (en) 1993-10-21
PT92593B (en) 1995-09-12
US5044734A (en) 1991-09-03
FI896040A0 (en) 1989-12-15
EP0374085A2 (en) 1990-06-20

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